10376148fSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
28c0984e5SSebastian Reichel /*
38c0984e5SSebastian Reichel * Copyright (C) ST-Ericsson SA 2012
48c0984e5SSebastian Reichel *
58c0984e5SSebastian Reichel * Battery temperature driver for AB8500
68c0984e5SSebastian Reichel *
78c0984e5SSebastian Reichel * Author:
88c0984e5SSebastian Reichel * Johan Palsson <johan.palsson@stericsson.com>
98c0984e5SSebastian Reichel * Karl Komierowski <karl.komierowski@stericsson.com>
108c0984e5SSebastian Reichel * Arun R Murthy <arun.murthy@stericsson.com>
118c0984e5SSebastian Reichel */
128c0984e5SSebastian Reichel
138c0984e5SSebastian Reichel #include <linux/init.h>
148c0984e5SSebastian Reichel #include <linux/module.h>
158c0984e5SSebastian Reichel #include <linux/device.h>
161c1f13a0SLinus Walleij #include <linux/component.h>
178c0984e5SSebastian Reichel #include <linux/interrupt.h>
188c0984e5SSebastian Reichel #include <linux/delay.h>
198c0984e5SSebastian Reichel #include <linux/slab.h>
208c0984e5SSebastian Reichel #include <linux/platform_device.h>
218c0984e5SSebastian Reichel #include <linux/power_supply.h>
228c0984e5SSebastian Reichel #include <linux/completion.h>
238c0984e5SSebastian Reichel #include <linux/workqueue.h>
248c0984e5SSebastian Reichel #include <linux/jiffies.h>
258c0984e5SSebastian Reichel #include <linux/of.h>
268c0984e5SSebastian Reichel #include <linux/mfd/core.h>
278c0984e5SSebastian Reichel #include <linux/mfd/abx500.h>
288c0984e5SSebastian Reichel #include <linux/mfd/abx500/ab8500.h>
292b0e7ac0SLinus Walleij #include <linux/thermal.h>
300a8686e3SLinus Walleij #include <linux/iio/consumer.h>
31f8205474SLinus Walleij #include <linux/fixp-arith.h>
328c0984e5SSebastian Reichel
33417c0fc2SLinus Walleij #include "ab8500-bm.h"
34417c0fc2SLinus Walleij
358c0984e5SSebastian Reichel #define BTEMP_THERMAL_LOW_LIMIT -10
368c0984e5SSebastian Reichel #define BTEMP_THERMAL_MED_LIMIT 0
378c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_52 52
388c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_57 57
398c0984e5SSebastian Reichel #define BTEMP_THERMAL_HIGH_LIMIT_62 62
408c0984e5SSebastian Reichel
418c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_7UA 7
428c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_20UA 20
438c0984e5SSebastian Reichel
448c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_16UA 16
458c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_18UA 18
468c0984e5SSebastian Reichel
478c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_60UA 60
488c0984e5SSebastian Reichel #define BTEMP_BATCTRL_CURR_SRC_120UA 120
498c0984e5SSebastian Reichel
508c0984e5SSebastian Reichel /**
518c0984e5SSebastian Reichel * struct ab8500_btemp_interrupts - ab8500 interrupts
528c0984e5SSebastian Reichel * @name: name of the interrupt
538c0984e5SSebastian Reichel * @isr function pointer to the isr
548c0984e5SSebastian Reichel */
558c0984e5SSebastian Reichel struct ab8500_btemp_interrupts {
568c0984e5SSebastian Reichel char *name;
578c0984e5SSebastian Reichel irqreturn_t (*isr)(int irq, void *data);
588c0984e5SSebastian Reichel };
598c0984e5SSebastian Reichel
608c0984e5SSebastian Reichel struct ab8500_btemp_events {
618c0984e5SSebastian Reichel bool batt_rem;
628c0984e5SSebastian Reichel bool btemp_high;
638c0984e5SSebastian Reichel bool btemp_medhigh;
648c0984e5SSebastian Reichel bool btemp_lowmed;
658c0984e5SSebastian Reichel bool btemp_low;
668c0984e5SSebastian Reichel bool ac_conn;
678c0984e5SSebastian Reichel bool usb_conn;
688c0984e5SSebastian Reichel };
698c0984e5SSebastian Reichel
708c0984e5SSebastian Reichel struct ab8500_btemp_ranges {
718c0984e5SSebastian Reichel int btemp_high_limit;
728c0984e5SSebastian Reichel int btemp_med_limit;
738c0984e5SSebastian Reichel int btemp_low_limit;
748c0984e5SSebastian Reichel };
758c0984e5SSebastian Reichel
768c0984e5SSebastian Reichel /**
778c0984e5SSebastian Reichel * struct ab8500_btemp - ab8500 BTEMP device information
788c0984e5SSebastian Reichel * @dev: Pointer to the structure device
798c0984e5SSebastian Reichel * @node: List of AB8500 BTEMPs, hence prepared for reentrance
808c0984e5SSebastian Reichel * @curr_source: What current source we use, in uA
81c56ca24aSColin Ian King * @bat_temp: Dispatched battery temperature in degree Celsius
82c56ca24aSColin Ian King * @prev_bat_temp Last measured battery temperature in degree Celsius
838c0984e5SSebastian Reichel * @parent: Pointer to the struct ab8500
842b0e7ac0SLinus Walleij * @tz: Thermal zone for the battery
850a8686e3SLinus Walleij * @adc_bat_ctrl: ADC channel for the battery control
868c0984e5SSebastian Reichel * @fg: Pointer to the struct fg
878c0984e5SSebastian Reichel * @bm: Platform specific battery management information
888c0984e5SSebastian Reichel * @btemp_psy: Structure for BTEMP specific battery properties
898c0984e5SSebastian Reichel * @events: Structure for information about events triggered
908c0984e5SSebastian Reichel * @btemp_ranges: Battery temperature range structure
918c0984e5SSebastian Reichel * @btemp_wq: Work queue for measuring the temperature periodically
928c0984e5SSebastian Reichel * @btemp_periodic_work: Work for measuring the temperature periodically
938c0984e5SSebastian Reichel * @initialized: True if battery id read.
948c0984e5SSebastian Reichel */
958c0984e5SSebastian Reichel struct ab8500_btemp {
968c0984e5SSebastian Reichel struct device *dev;
978c0984e5SSebastian Reichel struct list_head node;
988c0984e5SSebastian Reichel int curr_source;
998c0984e5SSebastian Reichel int bat_temp;
1008c0984e5SSebastian Reichel int prev_bat_temp;
1018c0984e5SSebastian Reichel struct ab8500 *parent;
1022b0e7ac0SLinus Walleij struct thermal_zone_device *tz;
1030a8686e3SLinus Walleij struct iio_channel *bat_ctrl;
1048c0984e5SSebastian Reichel struct ab8500_fg *fg;
105484a9cc3SLinus Walleij struct ab8500_bm_data *bm;
1068c0984e5SSebastian Reichel struct power_supply *btemp_psy;
1078c0984e5SSebastian Reichel struct ab8500_btemp_events events;
1088c0984e5SSebastian Reichel struct ab8500_btemp_ranges btemp_ranges;
1098c0984e5SSebastian Reichel struct workqueue_struct *btemp_wq;
1108c0984e5SSebastian Reichel struct delayed_work btemp_periodic_work;
1118c0984e5SSebastian Reichel bool initialized;
1128c0984e5SSebastian Reichel };
1138c0984e5SSebastian Reichel
1148c0984e5SSebastian Reichel /* BTEMP power supply properties */
1158c0984e5SSebastian Reichel static enum power_supply_property ab8500_btemp_props[] = {
1168c0984e5SSebastian Reichel POWER_SUPPLY_PROP_PRESENT,
1178c0984e5SSebastian Reichel POWER_SUPPLY_PROP_ONLINE,
1188c0984e5SSebastian Reichel POWER_SUPPLY_PROP_TEMP,
1198c0984e5SSebastian Reichel };
1208c0984e5SSebastian Reichel
1218c0984e5SSebastian Reichel static LIST_HEAD(ab8500_btemp_list);
1228c0984e5SSebastian Reichel
1238c0984e5SSebastian Reichel /**
1248c0984e5SSebastian Reichel * ab8500_btemp_batctrl_volt_to_res() - convert batctrl voltage to resistance
1258c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure
1268c0984e5SSebastian Reichel * @v_batctrl: measured batctrl voltage
1278c0984e5SSebastian Reichel * @inst_curr: measured instant current
1288c0984e5SSebastian Reichel *
1298c0984e5SSebastian Reichel * This function returns the battery resistance that is
1308c0984e5SSebastian Reichel * derived from the BATCTRL voltage.
1318c0984e5SSebastian Reichel * Returns value in Ohms.
1328c0984e5SSebastian Reichel */
ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp * di,int v_batctrl,int inst_curr)1338c0984e5SSebastian Reichel static int ab8500_btemp_batctrl_volt_to_res(struct ab8500_btemp *di,
1348c0984e5SSebastian Reichel int v_batctrl, int inst_curr)
1358c0984e5SSebastian Reichel {
1368c0984e5SSebastian Reichel if (is_ab8500_1p1_or_earlier(di->parent)) {
1378c0984e5SSebastian Reichel /*
1388c0984e5SSebastian Reichel * For ABB cut1.0 and 1.1 BAT_CTRL is internally
1398c0984e5SSebastian Reichel * connected to 1.8V through a 450k resistor
1408c0984e5SSebastian Reichel */
1418c0984e5SSebastian Reichel return (450000 * (v_batctrl)) / (1800 - v_batctrl);
1428c0984e5SSebastian Reichel }
1438c0984e5SSebastian Reichel
1448c0984e5SSebastian Reichel /*
1458c0984e5SSebastian Reichel * BAT_CTRL is internally
1468c0984e5SSebastian Reichel * connected to 1.8V through a 80k resistor
1478c0984e5SSebastian Reichel */
148d58964beSLinus Walleij return (80000 * (v_batctrl)) / (1800 - v_batctrl);
1498c0984e5SSebastian Reichel }
1508c0984e5SSebastian Reichel
1518c0984e5SSebastian Reichel /**
1528c0984e5SSebastian Reichel * ab8500_btemp_read_batctrl_voltage() - measure batctrl voltage
1538c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure
1548c0984e5SSebastian Reichel *
1558c0984e5SSebastian Reichel * This function returns the voltage on BATCTRL. Returns value in mV.
1568c0984e5SSebastian Reichel */
ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp * di)1578c0984e5SSebastian Reichel static int ab8500_btemp_read_batctrl_voltage(struct ab8500_btemp *di)
1588c0984e5SSebastian Reichel {
1590a8686e3SLinus Walleij int vbtemp, ret;
1608c0984e5SSebastian Reichel static int prev;
1618c0984e5SSebastian Reichel
1620a8686e3SLinus Walleij ret = iio_read_channel_processed(di->bat_ctrl, &vbtemp);
1630a8686e3SLinus Walleij if (ret < 0) {
1648c0984e5SSebastian Reichel dev_err(di->dev,
1650a8686e3SLinus Walleij "%s ADC conversion failed, using previous value",
1668c0984e5SSebastian Reichel __func__);
1678c0984e5SSebastian Reichel return prev;
1688c0984e5SSebastian Reichel }
1698c0984e5SSebastian Reichel prev = vbtemp;
1708c0984e5SSebastian Reichel return vbtemp;
1718c0984e5SSebastian Reichel }
1728c0984e5SSebastian Reichel
1738c0984e5SSebastian Reichel /**
1748c0984e5SSebastian Reichel * ab8500_btemp_get_batctrl_res() - get battery resistance
1758c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure
1768c0984e5SSebastian Reichel *
1778c0984e5SSebastian Reichel * This function returns the battery pack identification resistance.
1788c0984e5SSebastian Reichel * Returns value in Ohms.
1798c0984e5SSebastian Reichel */
ab8500_btemp_get_batctrl_res(struct ab8500_btemp * di)1808c0984e5SSebastian Reichel static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di)
1818c0984e5SSebastian Reichel {
1828c0984e5SSebastian Reichel int ret;
1838c0984e5SSebastian Reichel int batctrl = 0;
1848c0984e5SSebastian Reichel int res;
1858c0984e5SSebastian Reichel int inst_curr;
1868c0984e5SSebastian Reichel int i;
1878c0984e5SSebastian Reichel
1888c0984e5SSebastian Reichel if (!di->fg)
1898c0984e5SSebastian Reichel di->fg = ab8500_fg_get();
1908c0984e5SSebastian Reichel if (!di->fg) {
1918c0984e5SSebastian Reichel dev_err(di->dev, "No fg found\n");
1928c0984e5SSebastian Reichel return -EINVAL;
1938c0984e5SSebastian Reichel }
1948c0984e5SSebastian Reichel
1958c0984e5SSebastian Reichel ret = ab8500_fg_inst_curr_start(di->fg);
1968c0984e5SSebastian Reichel
1978c0984e5SSebastian Reichel if (ret) {
1988c0984e5SSebastian Reichel dev_err(di->dev, "Failed to start current measurement\n");
1998c0984e5SSebastian Reichel return ret;
2008c0984e5SSebastian Reichel }
2018c0984e5SSebastian Reichel
2028c0984e5SSebastian Reichel do {
2038c0984e5SSebastian Reichel msleep(20);
2048c0984e5SSebastian Reichel } while (!ab8500_fg_inst_curr_started(di->fg));
2058c0984e5SSebastian Reichel
2068c0984e5SSebastian Reichel i = 0;
2078c0984e5SSebastian Reichel
2088c0984e5SSebastian Reichel do {
2098c0984e5SSebastian Reichel batctrl += ab8500_btemp_read_batctrl_voltage(di);
2108c0984e5SSebastian Reichel i++;
2118c0984e5SSebastian Reichel msleep(20);
2128c0984e5SSebastian Reichel } while (!ab8500_fg_inst_curr_done(di->fg));
2138c0984e5SSebastian Reichel batctrl /= i;
2148c0984e5SSebastian Reichel
2158c0984e5SSebastian Reichel ret = ab8500_fg_inst_curr_finalize(di->fg, &inst_curr);
2168c0984e5SSebastian Reichel if (ret) {
2178c0984e5SSebastian Reichel dev_err(di->dev, "Failed to finalize current measurement\n");
2188c0984e5SSebastian Reichel return ret;
2198c0984e5SSebastian Reichel }
2208c0984e5SSebastian Reichel
2218c0984e5SSebastian Reichel res = ab8500_btemp_batctrl_volt_to_res(di, batctrl, inst_curr);
2228c0984e5SSebastian Reichel
2238c0984e5SSebastian Reichel dev_dbg(di->dev, "%s batctrl: %d res: %d inst_curr: %d samples: %d\n",
2248c0984e5SSebastian Reichel __func__, batctrl, res, inst_curr, i);
2258c0984e5SSebastian Reichel
2268c0984e5SSebastian Reichel return res;
2278c0984e5SSebastian Reichel }
2288c0984e5SSebastian Reichel
2298c0984e5SSebastian Reichel /**
2308c0984e5SSebastian Reichel * ab8500_btemp_id() - Identify the connected battery
2318c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure
2328c0984e5SSebastian Reichel *
2338c0984e5SSebastian Reichel * This function will try to identify the battery by reading the ID
2348c0984e5SSebastian Reichel * resistor. Some brands use a combined ID resistor with a NTC resistor to
2358c0984e5SSebastian Reichel * both be able to identify and to read the temperature of it.
2368c0984e5SSebastian Reichel */
ab8500_btemp_id(struct ab8500_btemp * di)2378c0984e5SSebastian Reichel static int ab8500_btemp_id(struct ab8500_btemp *di)
2388c0984e5SSebastian Reichel {
2391f918e0fSLinus Walleij struct power_supply_battery_info *bi = di->bm->bi;
2408c0984e5SSebastian Reichel int res;
2418c0984e5SSebastian Reichel
2424c4268dcSLinus Walleij di->curr_source = BTEMP_BATCTRL_CURR_SRC_7UA;
2438c0984e5SSebastian Reichel
2448c0984e5SSebastian Reichel res = ab8500_btemp_get_batctrl_res(di);
2458c0984e5SSebastian Reichel if (res < 0) {
2468c0984e5SSebastian Reichel dev_err(di->dev, "%s get batctrl res failed\n", __func__);
2478c0984e5SSebastian Reichel return -ENXIO;
2488c0984e5SSebastian Reichel }
2498c0984e5SSebastian Reichel
2501f918e0fSLinus Walleij if (power_supply_battery_bti_in_range(bi, res)) {
2511f918e0fSLinus Walleij dev_info(di->dev, "Battery detected on BATCTRL (pin C3)"
2521f918e0fSLinus Walleij " resistance %d Ohm = %d Ohm +/- %d%%\n",
2531f918e0fSLinus Walleij res, bi->bti_resistance_ohm,
2541f918e0fSLinus Walleij bi->bti_resistance_tolerance);
255e5dff305SLinus Walleij } else {
2568c0984e5SSebastian Reichel dev_warn(di->dev, "Battery identified as unknown"
2578c0984e5SSebastian Reichel ", resistance %d Ohm\n", res);
2588c0984e5SSebastian Reichel return -ENXIO;
2598c0984e5SSebastian Reichel }
2608c0984e5SSebastian Reichel
261e5dff305SLinus Walleij return 0;
2628c0984e5SSebastian Reichel }
2638c0984e5SSebastian Reichel
2648c0984e5SSebastian Reichel /**
2658c0984e5SSebastian Reichel * ab8500_btemp_periodic_work() - Measuring the temperature periodically
2668c0984e5SSebastian Reichel * @work: pointer to the work_struct structure
2678c0984e5SSebastian Reichel *
2688c0984e5SSebastian Reichel * Work function for measuring the temperature periodically
2698c0984e5SSebastian Reichel */
ab8500_btemp_periodic_work(struct work_struct * work)2708c0984e5SSebastian Reichel static void ab8500_btemp_periodic_work(struct work_struct *work)
2718c0984e5SSebastian Reichel {
2728c0984e5SSebastian Reichel int interval;
2738c0984e5SSebastian Reichel int bat_temp;
2748c0984e5SSebastian Reichel struct ab8500_btemp *di = container_of(work,
2758c0984e5SSebastian Reichel struct ab8500_btemp, btemp_periodic_work.work);
2762b0e7ac0SLinus Walleij /* Assume 25 degrees celsius as start temperature */
2772b0e7ac0SLinus Walleij static int prev = 25;
2782b0e7ac0SLinus Walleij int ret;
2798c0984e5SSebastian Reichel
2808c0984e5SSebastian Reichel if (!di->initialized) {
2818c0984e5SSebastian Reichel /* Identify the battery */
2828c0984e5SSebastian Reichel if (ab8500_btemp_id(di) < 0)
2838c0984e5SSebastian Reichel dev_warn(di->dev, "failed to identify the battery\n");
2848c0984e5SSebastian Reichel }
2858c0984e5SSebastian Reichel
2862b0e7ac0SLinus Walleij /* Failover if a reading is erroneous, use last meausurement */
2872b0e7ac0SLinus Walleij ret = thermal_zone_get_temp(di->tz, &bat_temp);
2882b0e7ac0SLinus Walleij if (ret) {
2892b0e7ac0SLinus Walleij dev_err(di->dev, "error reading temperature\n");
2902b0e7ac0SLinus Walleij bat_temp = prev;
2912b0e7ac0SLinus Walleij } else {
2922b0e7ac0SLinus Walleij /* Convert from millicentigrades to centigrades */
2932b0e7ac0SLinus Walleij bat_temp /= 1000;
2942b0e7ac0SLinus Walleij prev = bat_temp;
2952b0e7ac0SLinus Walleij }
2962b0e7ac0SLinus Walleij
2978c0984e5SSebastian Reichel /*
2988c0984e5SSebastian Reichel * Filter battery temperature.
2998c0984e5SSebastian Reichel * Allow direct updates on temperature only if two samples result in
3008c0984e5SSebastian Reichel * same temperature. Else only allow 1 degree change from previous
3018c0984e5SSebastian Reichel * reported value in the direction of the new measurement.
3028c0984e5SSebastian Reichel */
3038c0984e5SSebastian Reichel if ((bat_temp == di->prev_bat_temp) || !di->initialized) {
3048c0984e5SSebastian Reichel if ((di->bat_temp != di->prev_bat_temp) || !di->initialized) {
3058c0984e5SSebastian Reichel di->initialized = true;
3068c0984e5SSebastian Reichel di->bat_temp = bat_temp;
3078c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy);
3088c0984e5SSebastian Reichel }
3098c0984e5SSebastian Reichel } else if (bat_temp < di->prev_bat_temp) {
3108c0984e5SSebastian Reichel di->bat_temp--;
3118c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy);
3128c0984e5SSebastian Reichel } else if (bat_temp > di->prev_bat_temp) {
3138c0984e5SSebastian Reichel di->bat_temp++;
3148c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy);
3158c0984e5SSebastian Reichel }
3168c0984e5SSebastian Reichel di->prev_bat_temp = bat_temp;
3178c0984e5SSebastian Reichel
3188c0984e5SSebastian Reichel if (di->events.ac_conn || di->events.usb_conn)
3198c0984e5SSebastian Reichel interval = di->bm->temp_interval_chg;
3208c0984e5SSebastian Reichel else
3218c0984e5SSebastian Reichel interval = di->bm->temp_interval_nochg;
3228c0984e5SSebastian Reichel
3238c0984e5SSebastian Reichel /* Schedule a new measurement */
3248c0984e5SSebastian Reichel queue_delayed_work(di->btemp_wq,
3258c0984e5SSebastian Reichel &di->btemp_periodic_work,
3268c0984e5SSebastian Reichel round_jiffies(interval * HZ));
3278c0984e5SSebastian Reichel }
3288c0984e5SSebastian Reichel
3298c0984e5SSebastian Reichel /**
3308c0984e5SSebastian Reichel * ab8500_btemp_batctrlindb_handler() - battery removal detected
3318c0984e5SSebastian Reichel * @irq: interrupt number
3328c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp
3338c0984e5SSebastian Reichel *
3348c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED)
3358c0984e5SSebastian Reichel */
ab8500_btemp_batctrlindb_handler(int irq,void * _di)3368c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_batctrlindb_handler(int irq, void *_di)
3378c0984e5SSebastian Reichel {
3388c0984e5SSebastian Reichel struct ab8500_btemp *di = _di;
3398c0984e5SSebastian Reichel dev_err(di->dev, "Battery removal detected!\n");
3408c0984e5SSebastian Reichel
3418c0984e5SSebastian Reichel di->events.batt_rem = true;
3428c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy);
3438c0984e5SSebastian Reichel
3448c0984e5SSebastian Reichel return IRQ_HANDLED;
3458c0984e5SSebastian Reichel }
3468c0984e5SSebastian Reichel
3478c0984e5SSebastian Reichel /**
3488c0984e5SSebastian Reichel * ab8500_btemp_templow_handler() - battery temp lower than 10 degrees
3498c0984e5SSebastian Reichel * @irq: interrupt number
3508c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp
3518c0984e5SSebastian Reichel *
3528c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED)
3538c0984e5SSebastian Reichel */
ab8500_btemp_templow_handler(int irq,void * _di)3548c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_templow_handler(int irq, void *_di)
3558c0984e5SSebastian Reichel {
3568c0984e5SSebastian Reichel struct ab8500_btemp *di = _di;
3578c0984e5SSebastian Reichel
3588c0984e5SSebastian Reichel if (is_ab8500_3p3_or_earlier(di->parent)) {
3598c0984e5SSebastian Reichel dev_dbg(di->dev, "Ignore false btemp low irq"
3608c0984e5SSebastian Reichel " for ABB cut 1.0, 1.1, 2.0 and 3.3\n");
3618c0984e5SSebastian Reichel } else {
3628c0984e5SSebastian Reichel dev_crit(di->dev, "Battery temperature lower than -10deg c\n");
3638c0984e5SSebastian Reichel
3648c0984e5SSebastian Reichel di->events.btemp_low = true;
3658c0984e5SSebastian Reichel di->events.btemp_high = false;
3668c0984e5SSebastian Reichel di->events.btemp_medhigh = false;
3678c0984e5SSebastian Reichel di->events.btemp_lowmed = false;
3688c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy);
3698c0984e5SSebastian Reichel }
3708c0984e5SSebastian Reichel
3718c0984e5SSebastian Reichel return IRQ_HANDLED;
3728c0984e5SSebastian Reichel }
3738c0984e5SSebastian Reichel
3748c0984e5SSebastian Reichel /**
3758c0984e5SSebastian Reichel * ab8500_btemp_temphigh_handler() - battery temp higher than max temp
3768c0984e5SSebastian Reichel * @irq: interrupt number
3778c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp
3788c0984e5SSebastian Reichel *
3798c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED)
3808c0984e5SSebastian Reichel */
ab8500_btemp_temphigh_handler(int irq,void * _di)3818c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_temphigh_handler(int irq, void *_di)
3828c0984e5SSebastian Reichel {
3838c0984e5SSebastian Reichel struct ab8500_btemp *di = _di;
3848c0984e5SSebastian Reichel
3858c0984e5SSebastian Reichel dev_crit(di->dev, "Battery temperature is higher than MAX temp\n");
3868c0984e5SSebastian Reichel
3878c0984e5SSebastian Reichel di->events.btemp_high = true;
3888c0984e5SSebastian Reichel di->events.btemp_medhigh = false;
3898c0984e5SSebastian Reichel di->events.btemp_lowmed = false;
3908c0984e5SSebastian Reichel di->events.btemp_low = false;
3918c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy);
3928c0984e5SSebastian Reichel
3938c0984e5SSebastian Reichel return IRQ_HANDLED;
3948c0984e5SSebastian Reichel }
3958c0984e5SSebastian Reichel
3968c0984e5SSebastian Reichel /**
3978c0984e5SSebastian Reichel * ab8500_btemp_lowmed_handler() - battery temp between low and medium
3988c0984e5SSebastian Reichel * @irq: interrupt number
3998c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp
4008c0984e5SSebastian Reichel *
4018c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED)
4028c0984e5SSebastian Reichel */
ab8500_btemp_lowmed_handler(int irq,void * _di)4038c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_lowmed_handler(int irq, void *_di)
4048c0984e5SSebastian Reichel {
4058c0984e5SSebastian Reichel struct ab8500_btemp *di = _di;
4068c0984e5SSebastian Reichel
4078c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is between low and medium\n");
4088c0984e5SSebastian Reichel
4098c0984e5SSebastian Reichel di->events.btemp_lowmed = true;
4108c0984e5SSebastian Reichel di->events.btemp_medhigh = false;
4118c0984e5SSebastian Reichel di->events.btemp_high = false;
4128c0984e5SSebastian Reichel di->events.btemp_low = false;
4138c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy);
4148c0984e5SSebastian Reichel
4158c0984e5SSebastian Reichel return IRQ_HANDLED;
4168c0984e5SSebastian Reichel }
4178c0984e5SSebastian Reichel
4188c0984e5SSebastian Reichel /**
4198c0984e5SSebastian Reichel * ab8500_btemp_medhigh_handler() - battery temp between medium and high
4208c0984e5SSebastian Reichel * @irq: interrupt number
4218c0984e5SSebastian Reichel * @_di: void pointer that has to address of ab8500_btemp
4228c0984e5SSebastian Reichel *
4238c0984e5SSebastian Reichel * Returns IRQ status(IRQ_HANDLED)
4248c0984e5SSebastian Reichel */
ab8500_btemp_medhigh_handler(int irq,void * _di)4258c0984e5SSebastian Reichel static irqreturn_t ab8500_btemp_medhigh_handler(int irq, void *_di)
4268c0984e5SSebastian Reichel {
4278c0984e5SSebastian Reichel struct ab8500_btemp *di = _di;
4288c0984e5SSebastian Reichel
4298c0984e5SSebastian Reichel dev_dbg(di->dev, "Battery temperature is between medium and high\n");
4308c0984e5SSebastian Reichel
4318c0984e5SSebastian Reichel di->events.btemp_medhigh = true;
4328c0984e5SSebastian Reichel di->events.btemp_lowmed = false;
4338c0984e5SSebastian Reichel di->events.btemp_high = false;
4348c0984e5SSebastian Reichel di->events.btemp_low = false;
4358c0984e5SSebastian Reichel power_supply_changed(di->btemp_psy);
4368c0984e5SSebastian Reichel
4378c0984e5SSebastian Reichel return IRQ_HANDLED;
4388c0984e5SSebastian Reichel }
4398c0984e5SSebastian Reichel
4408c0984e5SSebastian Reichel /**
4418c0984e5SSebastian Reichel * ab8500_btemp_periodic() - Periodic temperature measurements
4428c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure
4438c0984e5SSebastian Reichel * @enable: enable or disable periodic temperature measurements
4448c0984e5SSebastian Reichel *
4458c0984e5SSebastian Reichel * Starts of stops periodic temperature measurements. Periodic measurements
4468c0984e5SSebastian Reichel * should only be done when a charger is connected.
4478c0984e5SSebastian Reichel */
ab8500_btemp_periodic(struct ab8500_btemp * di,bool enable)4488c0984e5SSebastian Reichel static void ab8500_btemp_periodic(struct ab8500_btemp *di,
4498c0984e5SSebastian Reichel bool enable)
4508c0984e5SSebastian Reichel {
4518c0984e5SSebastian Reichel dev_dbg(di->dev, "Enable periodic temperature measurements: %d\n",
4528c0984e5SSebastian Reichel enable);
4538c0984e5SSebastian Reichel /*
4548c0984e5SSebastian Reichel * Make sure a new measurement is done directly by cancelling
4558c0984e5SSebastian Reichel * any pending work
4568c0984e5SSebastian Reichel */
4578c0984e5SSebastian Reichel cancel_delayed_work_sync(&di->btemp_periodic_work);
4588c0984e5SSebastian Reichel
4598c0984e5SSebastian Reichel if (enable)
4608c0984e5SSebastian Reichel queue_delayed_work(di->btemp_wq, &di->btemp_periodic_work, 0);
4618c0984e5SSebastian Reichel }
4628c0984e5SSebastian Reichel
4638c0984e5SSebastian Reichel /**
4648c0984e5SSebastian Reichel * ab8500_btemp_get_temp() - get battery temperature
4658c0984e5SSebastian Reichel * @di: pointer to the ab8500_btemp structure
4668c0984e5SSebastian Reichel *
4678c0984e5SSebastian Reichel * Returns battery temperature
4688c0984e5SSebastian Reichel */
ab8500_btemp_get_temp(struct ab8500_btemp * di)469417c0fc2SLinus Walleij static int ab8500_btemp_get_temp(struct ab8500_btemp *di)
4708c0984e5SSebastian Reichel {
4718c0984e5SSebastian Reichel int temp = 0;
4728c0984e5SSebastian Reichel
4738c0984e5SSebastian Reichel /*
4748c0984e5SSebastian Reichel * The BTEMP events are not reliabe on AB8500 cut3.3
4758c0984e5SSebastian Reichel * and prior versions
4768c0984e5SSebastian Reichel */
4778c0984e5SSebastian Reichel if (is_ab8500_3p3_or_earlier(di->parent)) {
4788c0984e5SSebastian Reichel temp = di->bat_temp * 10;
4798c0984e5SSebastian Reichel } else {
4808c0984e5SSebastian Reichel if (di->events.btemp_low) {
4818c0984e5SSebastian Reichel if (temp > di->btemp_ranges.btemp_low_limit)
4828c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_low_limit * 10;
4838c0984e5SSebastian Reichel else
4848c0984e5SSebastian Reichel temp = di->bat_temp * 10;
4858c0984e5SSebastian Reichel } else if (di->events.btemp_high) {
4868c0984e5SSebastian Reichel if (temp < di->btemp_ranges.btemp_high_limit)
4878c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_high_limit * 10;
4888c0984e5SSebastian Reichel else
4898c0984e5SSebastian Reichel temp = di->bat_temp * 10;
4908c0984e5SSebastian Reichel } else if (di->events.btemp_lowmed) {
4918c0984e5SSebastian Reichel if (temp > di->btemp_ranges.btemp_med_limit)
4928c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_med_limit * 10;
4938c0984e5SSebastian Reichel else
4948c0984e5SSebastian Reichel temp = di->bat_temp * 10;
4958c0984e5SSebastian Reichel } else if (di->events.btemp_medhigh) {
4968c0984e5SSebastian Reichel if (temp < di->btemp_ranges.btemp_med_limit)
4978c0984e5SSebastian Reichel temp = di->btemp_ranges.btemp_med_limit * 10;
4988c0984e5SSebastian Reichel else
4998c0984e5SSebastian Reichel temp = di->bat_temp * 10;
5008c0984e5SSebastian Reichel } else
5018c0984e5SSebastian Reichel temp = di->bat_temp * 10;
5028c0984e5SSebastian Reichel }
5038c0984e5SSebastian Reichel return temp;
5048c0984e5SSebastian Reichel }
5058c0984e5SSebastian Reichel
5068c0984e5SSebastian Reichel /**
5078c0984e5SSebastian Reichel * ab8500_btemp_get_property() - get the btemp properties
5088c0984e5SSebastian Reichel * @psy: pointer to the power_supply structure
5098c0984e5SSebastian Reichel * @psp: pointer to the power_supply_property structure
5108c0984e5SSebastian Reichel * @val: pointer to the power_supply_propval union
5118c0984e5SSebastian Reichel *
5128c0984e5SSebastian Reichel * This function gets called when an application tries to get the btemp
5138c0984e5SSebastian Reichel * properties by reading the sysfs files.
5148c0984e5SSebastian Reichel * online: presence of the battery
5158c0984e5SSebastian Reichel * present: presence of the battery
5168c0984e5SSebastian Reichel * technology: battery technology
5178c0984e5SSebastian Reichel * temp: battery temperature
5188c0984e5SSebastian Reichel * Returns error code in case of failure else 0(on success)
5198c0984e5SSebastian Reichel */
ab8500_btemp_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)5208c0984e5SSebastian Reichel static int ab8500_btemp_get_property(struct power_supply *psy,
5218c0984e5SSebastian Reichel enum power_supply_property psp,
5228c0984e5SSebastian Reichel union power_supply_propval *val)
5238c0984e5SSebastian Reichel {
5248c0984e5SSebastian Reichel struct ab8500_btemp *di = power_supply_get_drvdata(psy);
5258c0984e5SSebastian Reichel
5268c0984e5SSebastian Reichel switch (psp) {
5278c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_PRESENT:
5288c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_ONLINE:
5298c0984e5SSebastian Reichel if (di->events.batt_rem)
5308c0984e5SSebastian Reichel val->intval = 0;
5318c0984e5SSebastian Reichel else
5328c0984e5SSebastian Reichel val->intval = 1;
5338c0984e5SSebastian Reichel break;
5348c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_TEMP:
5358c0984e5SSebastian Reichel val->intval = ab8500_btemp_get_temp(di);
5368c0984e5SSebastian Reichel break;
5378c0984e5SSebastian Reichel default:
5388c0984e5SSebastian Reichel return -EINVAL;
5398c0984e5SSebastian Reichel }
5408c0984e5SSebastian Reichel return 0;
5418c0984e5SSebastian Reichel }
5428c0984e5SSebastian Reichel
ab8500_btemp_get_ext_psy_data(struct device * dev,void * data)5438c0984e5SSebastian Reichel static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data)
5448c0984e5SSebastian Reichel {
5458c0984e5SSebastian Reichel struct power_supply *psy;
5468c0984e5SSebastian Reichel struct power_supply *ext = dev_get_drvdata(dev);
5478c0984e5SSebastian Reichel const char **supplicants = (const char **)ext->supplied_to;
5488c0984e5SSebastian Reichel struct ab8500_btemp *di;
5498c0984e5SSebastian Reichel union power_supply_propval ret;
5508c0984e5SSebastian Reichel int j;
5518c0984e5SSebastian Reichel
5528c0984e5SSebastian Reichel psy = (struct power_supply *)data;
5538c0984e5SSebastian Reichel di = power_supply_get_drvdata(psy);
5548c0984e5SSebastian Reichel
5558c0984e5SSebastian Reichel /*
5568c0984e5SSebastian Reichel * For all psy where the name of your driver
5578c0984e5SSebastian Reichel * appears in any supplied_to
5588c0984e5SSebastian Reichel */
5598c0984e5SSebastian Reichel j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
5608c0984e5SSebastian Reichel if (j < 0)
5618c0984e5SSebastian Reichel return 0;
5628c0984e5SSebastian Reichel
5638c0984e5SSebastian Reichel /* Go through all properties for the psy */
5648c0984e5SSebastian Reichel for (j = 0; j < ext->desc->num_properties; j++) {
5658c0984e5SSebastian Reichel enum power_supply_property prop;
5668c0984e5SSebastian Reichel prop = ext->desc->properties[j];
5678c0984e5SSebastian Reichel
5688c0984e5SSebastian Reichel if (power_supply_get_property(ext, prop, &ret))
5698c0984e5SSebastian Reichel continue;
5708c0984e5SSebastian Reichel
5718c0984e5SSebastian Reichel switch (prop) {
5728c0984e5SSebastian Reichel case POWER_SUPPLY_PROP_PRESENT:
5738c0984e5SSebastian Reichel switch (ext->desc->type) {
5748c0984e5SSebastian Reichel case POWER_SUPPLY_TYPE_MAINS:
5758c0984e5SSebastian Reichel /* AC disconnected */
5768c0984e5SSebastian Reichel if (!ret.intval && di->events.ac_conn) {
5778c0984e5SSebastian Reichel di->events.ac_conn = false;
5788c0984e5SSebastian Reichel }
5798c0984e5SSebastian Reichel /* AC connected */
5808c0984e5SSebastian Reichel else if (ret.intval && !di->events.ac_conn) {
5818c0984e5SSebastian Reichel di->events.ac_conn = true;
5828c0984e5SSebastian Reichel if (!di->events.usb_conn)
5838c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true);
5848c0984e5SSebastian Reichel }
5858c0984e5SSebastian Reichel break;
5868c0984e5SSebastian Reichel case POWER_SUPPLY_TYPE_USB:
5878c0984e5SSebastian Reichel /* USB disconnected */
5888c0984e5SSebastian Reichel if (!ret.intval && di->events.usb_conn) {
5898c0984e5SSebastian Reichel di->events.usb_conn = false;
5908c0984e5SSebastian Reichel }
5918c0984e5SSebastian Reichel /* USB connected */
5928c0984e5SSebastian Reichel else if (ret.intval && !di->events.usb_conn) {
5938c0984e5SSebastian Reichel di->events.usb_conn = true;
5948c0984e5SSebastian Reichel if (!di->events.ac_conn)
5958c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true);
5968c0984e5SSebastian Reichel }
5978c0984e5SSebastian Reichel break;
5988c0984e5SSebastian Reichel default:
5998c0984e5SSebastian Reichel break;
6008c0984e5SSebastian Reichel }
6018c0984e5SSebastian Reichel break;
6028c0984e5SSebastian Reichel default:
6038c0984e5SSebastian Reichel break;
6048c0984e5SSebastian Reichel }
6058c0984e5SSebastian Reichel }
6068c0984e5SSebastian Reichel return 0;
6078c0984e5SSebastian Reichel }
6088c0984e5SSebastian Reichel
6098c0984e5SSebastian Reichel /**
6108c0984e5SSebastian Reichel * ab8500_btemp_external_power_changed() - callback for power supply changes
6118c0984e5SSebastian Reichel * @psy: pointer to the structure power_supply
6128c0984e5SSebastian Reichel *
6138c0984e5SSebastian Reichel * This function is pointing to the function pointer external_power_changed
6148c0984e5SSebastian Reichel * of the structure power_supply.
6158c0984e5SSebastian Reichel * This function gets executed when there is a change in the external power
6168c0984e5SSebastian Reichel * supply to the btemp.
6178c0984e5SSebastian Reichel */
ab8500_btemp_external_power_changed(struct power_supply * psy)6188c0984e5SSebastian Reichel static void ab8500_btemp_external_power_changed(struct power_supply *psy)
6198c0984e5SSebastian Reichel {
620a5299ce4SHans de Goede class_for_each_device(power_supply_class, NULL, psy,
621a5299ce4SHans de Goede ab8500_btemp_get_ext_psy_data);
6228c0984e5SSebastian Reichel }
6238c0984e5SSebastian Reichel
6248c0984e5SSebastian Reichel /* ab8500 btemp driver interrupts and their respective isr */
6258c0984e5SSebastian Reichel static struct ab8500_btemp_interrupts ab8500_btemp_irq[] = {
6268c0984e5SSebastian Reichel {"BAT_CTRL_INDB", ab8500_btemp_batctrlindb_handler},
6278c0984e5SSebastian Reichel {"BTEMP_LOW", ab8500_btemp_templow_handler},
6288c0984e5SSebastian Reichel {"BTEMP_HIGH", ab8500_btemp_temphigh_handler},
6298c0984e5SSebastian Reichel {"BTEMP_LOW_MEDIUM", ab8500_btemp_lowmed_handler},
6308c0984e5SSebastian Reichel {"BTEMP_MEDIUM_HIGH", ab8500_btemp_medhigh_handler},
6318c0984e5SSebastian Reichel };
6328c0984e5SSebastian Reichel
ab8500_btemp_resume(struct device * dev)633f8efa0a8SLinus Walleij static int __maybe_unused ab8500_btemp_resume(struct device *dev)
6348c0984e5SSebastian Reichel {
635f8efa0a8SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev);
6368c0984e5SSebastian Reichel
6378c0984e5SSebastian Reichel ab8500_btemp_periodic(di, true);
6388c0984e5SSebastian Reichel
6398c0984e5SSebastian Reichel return 0;
6408c0984e5SSebastian Reichel }
6418c0984e5SSebastian Reichel
ab8500_btemp_suspend(struct device * dev)642f8efa0a8SLinus Walleij static int __maybe_unused ab8500_btemp_suspend(struct device *dev)
6438c0984e5SSebastian Reichel {
644f8efa0a8SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev);
6458c0984e5SSebastian Reichel
6468c0984e5SSebastian Reichel ab8500_btemp_periodic(di, false);
6478c0984e5SSebastian Reichel
6488c0984e5SSebastian Reichel return 0;
6498c0984e5SSebastian Reichel }
6508c0984e5SSebastian Reichel
6518c0984e5SSebastian Reichel static char *supply_interface[] = {
6528c0984e5SSebastian Reichel "ab8500_chargalg",
6538c0984e5SSebastian Reichel "ab8500_fg",
6548c0984e5SSebastian Reichel };
6558c0984e5SSebastian Reichel
6568c0984e5SSebastian Reichel static const struct power_supply_desc ab8500_btemp_desc = {
6578c0984e5SSebastian Reichel .name = "ab8500_btemp",
658*dc77721eSLinus Walleij .type = POWER_SUPPLY_TYPE_UNKNOWN,
6598c0984e5SSebastian Reichel .properties = ab8500_btemp_props,
6608c0984e5SSebastian Reichel .num_properties = ARRAY_SIZE(ab8500_btemp_props),
6618c0984e5SSebastian Reichel .get_property = ab8500_btemp_get_property,
6628c0984e5SSebastian Reichel .external_power_changed = ab8500_btemp_external_power_changed,
6638c0984e5SSebastian Reichel };
6648c0984e5SSebastian Reichel
ab8500_btemp_bind(struct device * dev,struct device * master,void * data)6651c1f13a0SLinus Walleij static int ab8500_btemp_bind(struct device *dev, struct device *master,
6661c1f13a0SLinus Walleij void *data)
6671c1f13a0SLinus Walleij {
6681c1f13a0SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev);
6691c1f13a0SLinus Walleij
6701c1f13a0SLinus Walleij /* Create a work queue for the btemp */
6711c1f13a0SLinus Walleij di->btemp_wq =
6721c1f13a0SLinus Walleij alloc_workqueue("ab8500_btemp_wq", WQ_MEM_RECLAIM, 0);
6731c1f13a0SLinus Walleij if (di->btemp_wq == NULL) {
6741c1f13a0SLinus Walleij dev_err(dev, "failed to create work queue\n");
6751c1f13a0SLinus Walleij return -ENOMEM;
6761c1f13a0SLinus Walleij }
6771c1f13a0SLinus Walleij
6781c1f13a0SLinus Walleij /* Kick off periodic temperature measurements */
6791c1f13a0SLinus Walleij ab8500_btemp_periodic(di, true);
6801c1f13a0SLinus Walleij
6811c1f13a0SLinus Walleij return 0;
6821c1f13a0SLinus Walleij }
6831c1f13a0SLinus Walleij
ab8500_btemp_unbind(struct device * dev,struct device * master,void * data)6841c1f13a0SLinus Walleij static void ab8500_btemp_unbind(struct device *dev, struct device *master,
6851c1f13a0SLinus Walleij void *data)
6861c1f13a0SLinus Walleij {
6871c1f13a0SLinus Walleij struct ab8500_btemp *di = dev_get_drvdata(dev);
6881c1f13a0SLinus Walleij
6891c1f13a0SLinus Walleij /* Delete the work queue */
6901c1f13a0SLinus Walleij destroy_workqueue(di->btemp_wq);
6911c1f13a0SLinus Walleij }
6921c1f13a0SLinus Walleij
6931c1f13a0SLinus Walleij static const struct component_ops ab8500_btemp_component_ops = {
6941c1f13a0SLinus Walleij .bind = ab8500_btemp_bind,
6951c1f13a0SLinus Walleij .unbind = ab8500_btemp_unbind,
6961c1f13a0SLinus Walleij };
6971c1f13a0SLinus Walleij
ab8500_btemp_probe(struct platform_device * pdev)6988c0984e5SSebastian Reichel static int ab8500_btemp_probe(struct platform_device *pdev)
6998c0984e5SSebastian Reichel {
7008c0984e5SSebastian Reichel struct power_supply_config psy_cfg = {};
701ad89cb5fSLinus Walleij struct device *dev = &pdev->dev;
7028c0984e5SSebastian Reichel struct ab8500_btemp *di;
7038c0984e5SSebastian Reichel int irq, i, ret = 0;
7048c0984e5SSebastian Reichel u8 val;
7058c0984e5SSebastian Reichel
706ad89cb5fSLinus Walleij di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
707ad89cb5fSLinus Walleij if (!di)
7088c0984e5SSebastian Reichel return -ENOMEM;
7098c0984e5SSebastian Reichel
710417c0fc2SLinus Walleij di->bm = &ab8500_bm_data;
7118c0984e5SSebastian Reichel
7128c0984e5SSebastian Reichel /* get parent data */
713ad89cb5fSLinus Walleij di->dev = dev;
7148c0984e5SSebastian Reichel di->parent = dev_get_drvdata(pdev->dev.parent);
7150a8686e3SLinus Walleij
7162b0e7ac0SLinus Walleij /* Get thermal zone and ADC */
7172b0e7ac0SLinus Walleij di->tz = thermal_zone_get_zone_by_name("battery-thermal");
7182b0e7ac0SLinus Walleij if (IS_ERR(di->tz)) {
719767e6843SLinus Walleij ret = PTR_ERR(di->tz);
720767e6843SLinus Walleij /*
721767e6843SLinus Walleij * This usually just means we are probing before the thermal
722767e6843SLinus Walleij * zone, so just defer.
723767e6843SLinus Walleij */
724767e6843SLinus Walleij if (ret == -ENODEV)
725767e6843SLinus Walleij ret = -EPROBE_DEFER;
726767e6843SLinus Walleij return dev_err_probe(dev, ret,
7272b0e7ac0SLinus Walleij "failed to get battery thermal zone\n");
7280a8686e3SLinus Walleij }
729ad89cb5fSLinus Walleij di->bat_ctrl = devm_iio_channel_get(dev, "bat_ctrl");
7300a8686e3SLinus Walleij if (IS_ERR(di->bat_ctrl)) {
73136f1de0dSLinus Walleij ret = dev_err_probe(dev, PTR_ERR(di->bat_ctrl),
73236f1de0dSLinus Walleij "failed to get BAT CTRL ADC channel\n");
73336f1de0dSLinus Walleij return ret;
7340a8686e3SLinus Walleij }
7358c0984e5SSebastian Reichel
7368c0984e5SSebastian Reichel di->initialized = false;
7378c0984e5SSebastian Reichel
7388c0984e5SSebastian Reichel psy_cfg.supplied_to = supply_interface;
7398c0984e5SSebastian Reichel psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
7408c0984e5SSebastian Reichel psy_cfg.drv_data = di;
7418c0984e5SSebastian Reichel
7428c0984e5SSebastian Reichel /* Init work for measuring temperature periodically */
7438c0984e5SSebastian Reichel INIT_DEFERRABLE_WORK(&di->btemp_periodic_work,
7448c0984e5SSebastian Reichel ab8500_btemp_periodic_work);
7458c0984e5SSebastian Reichel
7468c0984e5SSebastian Reichel /* Set BTEMP thermal limits. Low and Med are fixed */
7478c0984e5SSebastian Reichel di->btemp_ranges.btemp_low_limit = BTEMP_THERMAL_LOW_LIMIT;
7488c0984e5SSebastian Reichel di->btemp_ranges.btemp_med_limit = BTEMP_THERMAL_MED_LIMIT;
7498c0984e5SSebastian Reichel
750ad89cb5fSLinus Walleij ret = abx500_get_register_interruptible(dev, AB8500_CHARGER,
7518c0984e5SSebastian Reichel AB8500_BTEMP_HIGH_TH, &val);
7528c0984e5SSebastian Reichel if (ret < 0) {
753ad89cb5fSLinus Walleij dev_err(dev, "%s ab8500 read failed\n", __func__);
7541c1f13a0SLinus Walleij return ret;
7558c0984e5SSebastian Reichel }
7568c0984e5SSebastian Reichel switch (val) {
7578c0984e5SSebastian Reichel case BTEMP_HIGH_TH_57_0:
7588c0984e5SSebastian Reichel case BTEMP_HIGH_TH_57_1:
7598c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit =
7608c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_57;
7618c0984e5SSebastian Reichel break;
7628c0984e5SSebastian Reichel case BTEMP_HIGH_TH_52:
7638c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit =
7648c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_52;
7658c0984e5SSebastian Reichel break;
7668c0984e5SSebastian Reichel case BTEMP_HIGH_TH_62:
7678c0984e5SSebastian Reichel di->btemp_ranges.btemp_high_limit =
7688c0984e5SSebastian Reichel BTEMP_THERMAL_HIGH_LIMIT_62;
7698c0984e5SSebastian Reichel break;
7708c0984e5SSebastian Reichel }
7718c0984e5SSebastian Reichel
7728c0984e5SSebastian Reichel /* Register BTEMP power supply class */
7731c1f13a0SLinus Walleij di->btemp_psy = devm_power_supply_register(dev, &ab8500_btemp_desc,
7748c0984e5SSebastian Reichel &psy_cfg);
7758c0984e5SSebastian Reichel if (IS_ERR(di->btemp_psy)) {
776ad89cb5fSLinus Walleij dev_err(dev, "failed to register BTEMP psy\n");
7771c1f13a0SLinus Walleij return PTR_ERR(di->btemp_psy);
7788c0984e5SSebastian Reichel }
7798c0984e5SSebastian Reichel
7808c0984e5SSebastian Reichel /* Register interrupts */
7818c0984e5SSebastian Reichel for (i = 0; i < ARRAY_SIZE(ab8500_btemp_irq); i++) {
7828c0984e5SSebastian Reichel irq = platform_get_irq_byname(pdev, ab8500_btemp_irq[i].name);
7831c1f13a0SLinus Walleij if (irq < 0)
7841c1f13a0SLinus Walleij return irq;
785b10e9700SKrzysztof Kozlowski
7861c1f13a0SLinus Walleij ret = devm_request_threaded_irq(dev, irq, NULL,
7871c1f13a0SLinus Walleij ab8500_btemp_irq[i].isr,
788df12470cSTian Tao IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
7898c0984e5SSebastian Reichel ab8500_btemp_irq[i].name, di);
7908c0984e5SSebastian Reichel
7918c0984e5SSebastian Reichel if (ret) {
792ad89cb5fSLinus Walleij dev_err(dev, "failed to request %s IRQ %d: %d\n"
7938c0984e5SSebastian Reichel , ab8500_btemp_irq[i].name, irq, ret);
7941c1f13a0SLinus Walleij return ret;
7958c0984e5SSebastian Reichel }
796ad89cb5fSLinus Walleij dev_dbg(dev, "Requested %s IRQ %d: %d\n",
7978c0984e5SSebastian Reichel ab8500_btemp_irq[i].name, irq, ret);
7988c0984e5SSebastian Reichel }
7998c0984e5SSebastian Reichel
8008c0984e5SSebastian Reichel platform_set_drvdata(pdev, di);
8018c0984e5SSebastian Reichel
8028c0984e5SSebastian Reichel list_add_tail(&di->node, &ab8500_btemp_list);
8038c0984e5SSebastian Reichel
8041c1f13a0SLinus Walleij return component_add(dev, &ab8500_btemp_component_ops);
8058c0984e5SSebastian Reichel }
806ccc023a5SKrzysztof Kozlowski
ab8500_btemp_remove(struct platform_device * pdev)8071c1f13a0SLinus Walleij static int ab8500_btemp_remove(struct platform_device *pdev)
8081c1f13a0SLinus Walleij {
8091c1f13a0SLinus Walleij component_del(&pdev->dev, &ab8500_btemp_component_ops);
8101c1f13a0SLinus Walleij
8111c1f13a0SLinus Walleij return 0;
8128c0984e5SSebastian Reichel }
8138c0984e5SSebastian Reichel
814f8efa0a8SLinus Walleij static SIMPLE_DEV_PM_OPS(ab8500_btemp_pm_ops, ab8500_btemp_suspend, ab8500_btemp_resume);
815f8efa0a8SLinus Walleij
8168c0984e5SSebastian Reichel static const struct of_device_id ab8500_btemp_match[] = {
8178c0984e5SSebastian Reichel { .compatible = "stericsson,ab8500-btemp", },
8188c0984e5SSebastian Reichel { },
8198c0984e5SSebastian Reichel };
820dfe52db1SZou Wei MODULE_DEVICE_TABLE(of, ab8500_btemp_match);
8218c0984e5SSebastian Reichel
8221c1f13a0SLinus Walleij struct platform_driver ab8500_btemp_driver = {
8238c0984e5SSebastian Reichel .probe = ab8500_btemp_probe,
8248c0984e5SSebastian Reichel .remove = ab8500_btemp_remove,
8258c0984e5SSebastian Reichel .driver = {
8268c0984e5SSebastian Reichel .name = "ab8500-btemp",
8278c0984e5SSebastian Reichel .of_match_table = ab8500_btemp_match,
828f8efa0a8SLinus Walleij .pm = &ab8500_btemp_pm_ops,
8298c0984e5SSebastian Reichel },
8308c0984e5SSebastian Reichel };
8318c0984e5SSebastian Reichel MODULE_LICENSE("GPL v2");
8328c0984e5SSebastian Reichel MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
8338c0984e5SSebastian Reichel MODULE_ALIAS("platform:ab8500-btemp");
8348c0984e5SSebastian Reichel MODULE_DESCRIPTION("AB8500 battery temperature driver");
835